Detail Info/Specs on Eccentric Chucks and Collet Chuck, used for the:

Rock-A-Bye Box & 3rd Axis in
Motion (designed by: Mark St.Leger)

Collet
Chuck:

Start with a 2 ½ sq. x 24 block, rip a saw
kerf down the center of one side.Then
cut ½ slices on Miter Saw.Mount
between centers and turn a tenon for your chuck.Mount in chuck and turn the opening to fit your needs, place your piece
in the collet chuck and tighten the chuck so the collet has a firm grip on your
work piece.(Note: use only for
small items).

(2
axis) Eccentric Chuck (for 1/8 off-center finial):

Start with a 2 ½ sq. x 1 ½ block. Mark
centers on both ends, on one end measure over from center 1/8 (for
off-center).Mount between centers
and turn your piece round, also turn a tenon for center work.Move the tailstock end to the 1/8 mark and turn a 2nd tenon
for off center work.Mount into
your chuck using the center tenon, turn a bullnose shape and bore a ½ hole
thru the piece (for knocking out the blank when your finished).

(3
axis) Eccentric Chuck (for 3/16 & 5/16 off-center):

Start with a 2 ½ sq. x 1 ½ block. Mark
centers on both ends, on one end measure over from center 3/16 & 5/16
(for off-center).Mount between
centers and turn your piece round, also turn a tenon for center work.Move the tailstock end to the 3/16 mark and turn a 2nd
tenon for off center work.Now move the tailstock end to the 5/16 mark and turn the 3rd
tenon.Mount into your chuck using
the center tenon, turn a bullnose shape and bore a 1 hole thru the piece (for
knocking out the blank when your finished).

Note: These jigs (chuck adaptors) are saved and used time
and again.Enjoy!!